Ovulation with no pain???

Any ladies out there that normally experience ovulation pain ever had a month where you have zero O pain...but still receive a peak on you opk? And then go on to get a BFP? I normally have O pain, but every once in a while I have a month where I don't have it...but I still get a peak reading on my opk. I'm worried that I don't actually ovulate those months....but just wondering if any ladies experience no O pain (and usually do) but still got a BFP?